Allow me to apologize up front for the stupidity of this question. I was evaluating one of the layout designs on this forum when it occured to me. Is there a standard direction for layouts. Now I read the NMRA stadards as far as polarity. However I'm asking a more simple question. Do trains on an oval run clock-wise, counter-clockwise, or either depending on preference? If its preference then how does one tell which direction a designer has in mind? Also if it depends then how about a poll to see which is more popular and why?